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We demonstrate a silicon electronic–photonic integrated 25 Gb/s nonreturn-to-zero transmitter that includes driver circuits, depletion-type Si ring modulator, Ge photodetector, temperature sensor, on-chip heater, and temperature controller, all monolithically integrated on a 0.25 μm photonic BiCMOS technology platform. The integrated transmitter successfully provides stable and optimal 25 Gb/s modulation characteristics against external temperature fluctuation.

We realized a fully integrated 25Gb/s Si ring modulator transmitter containing a temperature controller that guarantees the optimal ring modulator temperature against any temperature perturbation. The transmitter is implemented with a 0.25-μm photonic BiCMOS technology.

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